These files are probably grayscale files without an icc profile included. Photoshop, using the settings you show will assume the 15% dot gain profile. Lightroom assumes sRGB which is much more contrasty. You can see this difference in the massively different histograms. What you should do is save the file from Photoshop with icc profile included. Lightroom should then display them the same.
Do notice a nasty color management bug exists in Lightroom on Mavericks in the Develop panel: Jao's photo blog: Further quantification of the Mavericks color management problem that will make deep shadows plug up.